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Old Thursday 18th May 2017, 06:21   #1
s_legacy
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Optolyth Ceralin 8 x 49 Alpin fake/genuine?

Hello,

I have inherited my Grandfathers collection of binoculars, all of them being good, quality binoculars.

However, someone has claimed to me that one pair is fake. The binoculars in question are Optolyth Ceralin 8 x 40 Alpin.

What should I look for to confirm that they are genuine?
Is there anywhere I can take them to authenticate them?

Many thanks
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Old Thursday 18th May 2017, 06:49   #2
Simon Wates
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Quote:
Originally Posted by s_legacy View Post
Hello,

I have inherited my Grandfathers collection of binoculars, all of them being good, quality binoculars.

However, someone has claimed to me that one pair is fake. The binoculars in question are Optolyth Ceralin 8 x 40 Alpin.

What should I look for to confirm that they are genuine?
Is there anywhere I can take them to authenticate them?

Many thanks
Lucky you I hope the binoculars in question are genuine - they are an absolute classic birding binocular!

I'm sure the technical folk on here will come on here and help soon but meanwhile, maybe a photo would help?

Best wishes and welcome to BF!

PS: Just noticed that this is in the "others" forum - hope the mods can put it in the Binoculars secton.

Last edited by Simon Wates : Thursday 18th May 2017 at 07:08. Reason: PS
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Old Thursday 18th May 2017, 09:40   #3
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Hi,

Can you post some photos? or describe the binocular and why do they think it is fake ? what things exactly lead them to think it is fake?

Best wishes.
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Old Thursday 18th May 2017, 09:53   #4
Gijs van Ginkel
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s_legacy, post 1,
Optolyth does not have an 8x49 in its programme, it did however produce the Optolyth Alpin 8x40, a porro-glass with the following specifications:
Weight 470 g, FOV 115m/1000m, number of lenses=10, dimensions 150x160 mm, hardrubber body cover, foldable rubber eyecups. Ceralin is the name of the coating Optolyth has used for its binoculars/telescopes.
As you may notice the Alpins are very light and their handling comfort is excellent.
I have investigated some of the Optopyth models and these tests can be found on the WEB-site of House of Outdoor in The Netherlands.
Gijs van Ginkel
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Old Friday 19th May 2017, 18:10   #5
s_legacy
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Hello,
Thank you for your replies.

Yes, they are 8 x 40 not 8 x 49. That was a typo.

I didn't have a long enough conversation to find out the reason why this person claimed that they are fake. Because they have been in storage for a few years since my grandfather died I serviced the movements. However, I put a very light grease on the threads so it feels very light. Lighter than you might expect so maybe this is what he was thinking?
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Old Friday 19th May 2017, 20:07   #6
Gijs van Ginkel
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s_legacy, post 5,
The binoculars shown in your post are from a genuine Optolyth Alpin 8x40, no doubt about it.
Gijs van Ginkel
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Old Friday 19th May 2017, 21:03   #7
Binastro
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It seems genuine to me.

In rather better condition than most Alpins.

It is Zeiss and Leitz that seem to have many fakes.
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Old Saturday 20th May 2017, 02:34   #8
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Ah, but for one misplaced FAX message, I would have been the American Importer.

Bill
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“After two years in Washington, I longed for the realism and sincerity of Hollywood.”—Actor turned US Senator, Fred Thompson
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Old Monday 22nd May 2017, 09:55   #9
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I was the proud owner of a pair of Optolyth Alpin 12x50 until recently when a good friend "borrowed" them as they seemed to suit his "funny" eyes. They were a brilliant binocular in their time,mine were about 30 yrs old, and served me well when out on the moors and carrying a scope/tripod set up did not look like a good option. Get out and use yours they will be pleasing to use.
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Old Monday 22nd May 2017, 14:09   #10
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Pete.
I think the 12x50 Alpin suited his funny eyes because they are actually 12x42 and have weird exit pupils.
The small exit pupils stopped down his eyes reducing aberrations.
Holger Merlitz has a review I think.

I have one that needs cleaning internally, but I never got this done.
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Old Monday 22nd May 2017, 19:29   #11
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Quote:
Originally Posted by Gijs van Ginkel View Post
s_legacy, post 5,
The binoculars shown in your post are from a genuine Optolyth Alpin 8x40, no doubt about it.
Gijs van Ginkel
Here is your answer, yes, all looks fine to me. Used versions of that model often seems to have paint loss from the metal for some reason, but you have a good one.

Good luck
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Old Monday 22nd May 2017, 22:28   #12
pete seaman
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Quote:
Originally Posted by Binastro View Post
Pete.
I think the 12x50 Alpin suited his funny eyes because they are actually 12x42 and have weird exit pupils.
The small exit pupils stopped down his eyes reducing aberrations.
Holger Merlitz has a review I think.

I have one that needs cleaning internally, but I never got this done.
They do seem to be 50mm objectives when comparing them to my Helios 42mm but whatever they gave me great service
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Old Monday 22nd May 2017, 22:55   #13
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Hi Pete.
They are vignetted internally mainly by small prisms, which contributes to the low weight.
See Holger Merlitz test.

If you measure the exit pupil you will see the smaller than expected size.
50 divided by 12 is almost 4.2mm exit pupil, but you will see that it is smaller and an irregular shape.

However, this is all to the good.

I think that this is why your friend likes the binocular.

Many owners of the 12x50 Alpins absolutely love them.

Many 50mm binoculars work at much less than 50mm. Some as small as 39mm.
Measuring the objective size does not show the working aperture.

My selected Russian 12x45 is excellent due to the rather small exit pupil.

Last edited by Binastro : Monday 22nd May 2017 at 22:58.
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Old Tuesday 23rd May 2017, 14:14   #14
richard866945
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Optolyth Alpin cleaning.

Quote:
Originally Posted by Binastro View Post
Pete.
I think the 12x50 Alpin suited his funny eyes because they are actually 12x42 and have weird exit pupils.
The small exit pupils stopped down his eyes reducing aberrations.
Holger Merlitz has a review I think.

I have one that needs cleaning internally, but I never got this done.
Oh, why not? A lovely binocular and well worth the cost of cleaning.
Here I have to admit that I do that for a living so I will be happy to help.
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Old Tuesday 23rd May 2017, 15:54   #15
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Hi,

I haven't seen anything not fitting an older pair of Alpin 8x40 in the images (which should have shown the prism housings from the EP side - inscriptions and screw positions on there are often crucial) and I'm not aware of Optolyth fakes.

If I was trying to fake an old pair of bins, I would at least try to make it a later example with Ceralin Plus multicoatings - or fake a different and sought after model...

Joachim

Last edited by jring : Tuesday 23rd May 2017 at 22:38. Reason: speling
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Old Tuesday 23rd May 2017, 16:25   #16
pete seaman
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Originally Posted by Binastro View Post
Hi Pete.
They are vignetted internally mainly by small prisms, which contributes to the low weight.
See Holger Merlitz test.

If you measure the exit pupil you will see the smaller than expected size.
50 divided by 12 is almost 4.2mm exit pupil, but you will see that it is smaller and an irregular shape.

However, this is all to the good.

I think that this is why your friend likes the binocular.

Many owners of the 12x50 Alpins absolutely love them.

Many 50mm binoculars work at much less than 50mm. Some as small as 39mm.
Measuring the objective size does not show the working aperture.

My selected Russian 12x45 is excellent due to the rather small exit pupil.
Thanks for that info,there is always so much to learn about the working of optics.
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